Simplex 4048 manufacturer found

I was window-shopping on eBay, and found horns for sale manufactured by “Thomas”. The model is T-158, and they appear to be electronic. However, the grille and body style are EXACTLY the same as the elusive 4048.

https://www.ebay.com/itm/2-Vintage-Thomas-T-158-Alarm-Horns-92db-120V-2-Amp-Still-New-In-Box/372421457558?hash=item56b60c7696:g:bqcAAOSw0c9biZTX:rk:23:pf:0

That is a very great find! Awesome job on getting it!

From what I’m seeing online, Thomas was a division of Benjamin who made the 4030. I guess this was the successor to that horn.

And then succeeding this horn was the 4040!